Genesis 18:12

_ _ Therefore Sarah laughed within herself  Long delay seems to have weakened faith. Sarah treated the announcement as incredible, and when taxed with the silent sneer, she added falsehood to distrust. It was an aggravated offense (Acts 5:4), and nothing but grace saved her (Romans 9:18).

Genesis 18:12

Sarah laughed within herself  It was not a laughter of faith, like Abraham's, Genesis 17:17, but a laughter of doubting and distrust. The great objection which Sarah could not get over was her age. I am waxed old, and past child  bearing in a course of nature, especially having been hitherto barren, and which magnifies the difficulty, My lord is old also. Observe here, That Sarah calls Abraham her lord, and the Holy Ghost takes notice of it to her honour, and recommends it to the imitation of all Christian wives, 1 Peter 3:6. Sarah obeyed Abraham calling him lord, in token of respect and subjection.

Genesis 18:12

Therefore Sarah (g) laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?

(g) For she believed the order of nature, rather than believing the promise of God.

laughed:

Genesis 18:13 And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old?Genesis 17:17 Then Abraham fell upon his face, and laughed, and said in his heart, Shall [a child] be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?Genesis 21:6-7 And Sarah said, God hath made me to laugh, [so that] all that hear will laugh with me. ... And she said, Who would have said unto Abraham, that Sarah should have given children suck? for I have born [him] a son in his old age.Psalms 126:2Then was our mouth filled with laughter, and our tongue with singing: then said they among the heathen, The LORD hath done great things for them.Luke 1:18-20 And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years. ... And, behold, thou shalt be dumb, and not able to speak, until the day that these things shall be performed, because thou believest not my words, which shall be fulfilled in their season.Luke 1:34-35 Then said Mary unto the angel, How shall this be, seeing I know not a man? ... And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.Hebrews 11:11-12 Through faith also Sara herself received strength to conceive seed, and was delivered of a child when she was past age, because she judged him faithful who had promised. ... Therefore sprang there even of one, and him as good as dead, [so many] as the stars of the sky in multitude, and as the sand which is by the sea shore innumerable.

my:

Ephesians 5:33 Nevertheless let every one of you in particular so love his wife even as himself; and the wife [see] that she reverence [her] husband.1 Peter 3:6 Even as Sara obeyed Abraham, calling him lord: whose daughters ye are, as long as ye do well, and are not afraid with any amazement.